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重庆第三钢铁厂为了提高平炉炉顶寿命,在1956年12月中修时将原矽砖炉顶改为铝镁砖矽砖混合炉顶。铝镁砖尺寸为150×360 mm。炉顶砌法是两环铝镁砖夹一环矽砖,出钢口和进铁口上部各砌6环,每环均砌铝镁砖12块,矽砖环靠拱脚处砌三块铝镁砖,铝镁砖之间夹2mm厚的铁片,每5～6块铝镁砖为一组,用铁丝系于炉顶料架上(图1)。铝镁砖矽砖混合炉顶与矽砖炉顶在烘炉时升温相
In order to improve the life of open hearth furnace, Chongqing No.3 Steel Plant changed the original top of silica-top brick to the top of aluminum-magnesium brick and brick in the middle of repair in December 1956. Magnesia brick size is 150 × 360 mm. Top of the brick method is a ring of aluminum and magnesium brick folder a ring of silicon steel, tapping hole and the entrance to the upper part of each ring 6 rings, each ring are made of aluminum magnesium brick 12, Magnesia tiles, aluminum and magnesium sandwiched between 2mm thick iron sheet, every 5 to 6 pieces of aluminum and magnesium brick as a group with wire tied to the roof rack (Figure 1). Aluminum-magnesium brick brick top and top of the silicon brick furnace in the oven when the heating phase